Sanitary can-end seal



A. JOHNSON.

SANITARY CAN END SEAL.

APPLICATION FILED own 1916.

13%,596. Patented Dec. 2,1919.

IN VEN TOR.

WATTMNEY,

WITNESS.

AXEL JOHNSON, OF OAKLAND, CALIFORNIA, ASSIGNOR TO AMERICAN CAN COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEW JERSEY.

SANITARY CAN -E1\TD SEAL.

Specification of Letters Patent.

Patented Dec. 2, 1919.

To all whom it may concern:

Be it known that I, AxEL J OHNSON, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Sanitary Can End Seals, of which the following is a speclfication.

The present invention relates to a seal or closure for cans of the so-called sanitary or solderless type, and more particularly to a seal of thc type wherein ad acent outwardly projecting flanges formed upon the can body and the end are united together'bymeans of a separate sealing or clamping strip.

In seals of the character described it has been found difficult to retain the sealing strip upon the flanges of the can body and the end with sufficient tightness to insure a perfect seal. It has been customary in some cases to form an annular shoulder or crlmp in said adjacent flanges over which the sealing strip may be locked in order to retain the same in position.

The object of the present invention is to provide a seal of the type described in which the sealing strip is securehy retained in posltion upon the adjacent anges of the can body and the end without in any manner destroying the usefulness of the seal or interfering with the ready removal of said sealing strip in the opening of the can.

In order to comprehend the invention,

reference should be had to the accompanying drawings, wherein Figure 1 is a perspective view of a can, one of whose ends is sealed by means of my improved device.

Fig. 2 is a sectional detail of my seal, showing the relation of the various parts.

Fig. 8 is a similar view of a modified form of my seal.

Fig. 4 is a similar view of a second moditied form of my seal.

In the drawings the numeral 1 represents the body of a can or container, one of whose ends is to be hermetically sealed thereto after the can or containerhas been filled with the goods to be sealed therein. Said body 1 is formed with an outwardly proectmg annular flange 3, at the open end thereof. The can end 2 is formed with a shoulder 4 of a diameter suflicient to enter the open end of the can body, as shown at 5 1n igs. 2, 3 and 4, in close fitting relation. Said end 2 is also formed with an annular projecting flange 6 adapted to lie in substantially parallel relation with the flange 3 of the body 1.

In the form of the invention illustrated in Fig.2 of the drawings, the outer edge of the flange 6 of the end 2 is curled downwardly and inwardly, as at 7, said curl forming a retainer for a ring liner or other packing material 8. The flange 3 of the body-1 extends outwardly sufficiently to overlap said curled portion 7 of the end flange 6, as shown at 9. A sealing strip 10, of U-shaped section, is applied under pressure around the periphery of the can end to embrace the two adjacent flanges 6 and 3 of the end and the body respectively, and is crimped or clamped securely thereupon. By reason of the overlapping at 9 of the curled portion 7 of the end flange and the body flange 3, a ridge or hump is formed at said oint. The inner edges 11 of the sealing strip are therefore enabled to be pressed closer together than the portion overlying said ridge, thus securely retaining said sealing strip to prevent the same from slipping off under the internal pressure of the can when filled, processed and sealed, and thereby providing against the destruction of the seal.

An end extension or tab 12 is formed upon one end of one side of the sealing strip 10, preferably as illustrated in Figs. 1 and 2, to provide means for grasping said sealing strip. and by a pulling strain exerted thereon stripping the same from the flanges embraced t ereby to release the can end for the removal thereof for the opening of the can. The can may thus be opened without the use of a can opener or other special tool. This extension or tab 12 overlaps the opposing end of the sealing strip when crimped or seamed to the flanges to .beembraced thereby, but is easily bent outward-1y to serve as a hand piece when it is desired to remove or strip the sealing strip to release the end cover from the can body.

In the form of my seal shown in Fig. 3 of the drawings, no packing material whatever is employed between the ad acent flanges 6 and 3 of the can end 2 and the can bo y 1.

In its place packing material 8 is provided,

between the sealing strip 10 and said flanges. In this case no ridge is necessary at the outer edge of the flange, the elasticity of the packing, material 8 permitting the crimping of the inner edge 11 of said sealing strlp.

The seal may also be formed as illustrated in Fig. 4' of the drawings, wherein packing material 8 is interposed between the adjacent faces of the flanges 3 and 6 of the body 1 and the end 2 respectively and an addi-..

tional packing strip 8' is provided between the outer faces of said flanges and the sealing strip 10.

As in the form shown in Fig." 2 of the drawings, a ridge is provided at 9 by the overlapping of the flanges 3 and 6 to permit the edges 11 of said sealing strip 10 to be drawn closer together than the outerfportion of said strip. It will be noted that in all three forms a metal-to-metal seal is formed at the point 5 between the shoulder 4 of the end 2 and the side of -the body 1,

. said seal protectin the packing material downwardly and inwardly curled edge, a

sire to be understood as claiming the inven-' tion as broadly as the state of the art will permit. Having thus described my invention, what Iclaim as new and desire to protect by Letters Patent is 1. In a can seal, in combination, a can end having a shoulder to engage the interior of the can and a peripheral flange extending.

from said shoulder and terminating in a fibrous gasket-on the said flange around the said shoulder and inclosed and held thereon by the curled edge of the can end flange, a

can body having an outstanding flange arranged against said. gasket and overlapping and bearing underand against the inwardly curled edge of the can end flange, and an annular sealing strip encircling both the cover flange and thebody flange when in said assembled relation and binding them the inwar ly curled edge of "the can end Said tightly together, the body flange having a curve or crimp caused by the said overlappin of the body flange on thecurled edge of t e end flange.

2. In a can seal, in combination, a can'end having a shoulder to engage the interior of the can and a peripheral flange extending from said shoulder and terminating in a downwardly and inwardly curled edge, a fibrous gasket on the said flange around the said shoulder and inclosed and held thereon by the curled edge of the can end flange, a can body having an outstanding flange arranged against said gasket and overlappin and bearing under and against flange, an annular sealing 'strip encircling both the cover flange and the body flange when in said assembled relation and binding them tightly together, and gasket ma-' terial applied between said flanges and the sealing strip, the inner portion of the space between the upper and lower parts of the sealing strip being smaller than the outer portion of said space by reason of the vertical enlargement of the outer part of'the seam, and the body flange having a curve or crimp, caused by the said overlapping of the body flange on the curled edge of the end flange and the compression of the sealing strip. Q

3. In a can end seal, a can end having an outwardly projecting flange the outer edge 1 thereof being inwardly curled, a can body.

- having an outwardly projecting flange adapted to lie parallel with said end flange 101 and to overlap under the curled edge thereof, packing material interposed between said end flange and'said body flange, and a sealing strip for securing said flanges in permanent relation, said strip being ada ted to be crimped over. the curled outer go of the fl g ,of the can end.

4. In a can end seal, a can end havingan outwardly projecting flange the outer' edge thereof being inwardly curled, a can body having an outwardly projectingflange formed upon one'end thereof, said flan being adapted to lie parallel to the flange of said end and to overlap under the inwardly .curled edge thereof, a sealing strip adapted to be crimped over said flanges to hold the same in permanent relation, packing material itnerposed between the adjacent faces of said flanges, and packing material interposed between said-sealing strip and the outer surfaces of said flanges.

'5. In a can end seal, a can end having an outwardly projecting flange the outer ed e body thereof. being unwardly curled, a can having an outwardly projecting flange adapted to lie parallel with said end flange and to overlap under the curled edge thereof, packing-material interposed between said end flange and said body flange, and a sealing strip for securing said flanges in permanent relation, said strip being ada ted to be crimped over. the curled outer e geof the flange of the can end, and at one end there-- of provided with an extension section adapted to serve as a means for stripping the sealing strip from the flanges embraced thereby.

In testimony whereof I have signed my name to this specification in the presence of 10 two subscribing witnesses. 

